Air/fuel commissioning of a combustion appliance

A method for commissioning a gas valve assembly for controlling fuel flow to a combustion appliance, the method comprising:

• including a valve body with an inlet port and an outlet port in the gas valve assembly, and
• extending a fluid path between the inlet port and the outlet port, the gas valve assembly further including at least one valve situated in the fluid path between the inlet port and the outlet port, the gas valve assembly further including a controller secured relative to the valve body and in communication with the at least one valve, the controller configured to move the at least one valve between an open configuration, a closed configuration, and a plurality of intermediate configurations therebetween to control a flow of gas to a gas burner of the combustion appliance, the method further comprising:
• initiating, by an external device via a wireless or wired connection, a commissioning mode, using a wizard screen, in the controller of the gas valve assembly;
• activating the combustion appliance to start heating the gas burner;
• setting a burner load of the combustion appliance to a first set burner load;
• entering two or more A/F ratios for the first set burner load;
• running the combustion appliance at each of the entered A/F ratios at the first set burner load, and observing the operation of the combustion appliance to identify a desired A/F ratio for the first set burner load;
• saving the desired A/F ratio for the first set burner load to the controller of the gas valve assembly;
• and
• repeating in order to save a plurality of desired A/F ratios one for each of a plurality of different burner loads that are between a minimum burner load and a maximum burner load of the combustion appliance.